14-year-old Catherine Cook and her brother David had just moved to a place called Skillman in New Jersey, and found themselves sitting on the couch with a local yearbook, flicking through it and seeing if either of them recognized any of the faces as students at the school they had just recently started at.

The brother and sister also share an older brother, Geoff, who was 25 at the time.

“We were shocked at how useless the information was,” said Catherine. “That’s when we thought, what if we put the whole thing online? I’d always looked up to my brother Geoff. He’s 11 years older than me and had already launched a successful start-up. I thought if he started a company, I could too!”

Pitching their idea – soon to be known as MyYearbook.com – to their older brother Geoff, he immediately thought it was a great idea. In fact, he was so confident in their success that he invested $250,000 in the idea to get the website launched and off the ground.

After a not-so-slow start, the site had accumulated nearly a million members within 12 months, and membership has grown exponentially ever since, with a net worth around the $100 million mark. Big brother Geoff was quickly appointed CEO and the three of them continue to manage the business together.